perhaps a Chilton manual?? Perhaps it might be found at an automotive place like O'Riley's or Autozone. You might also try Wal-mart or the Public Library or maybe even Google on the internet. Good Luck..
You're going to need a schematic of the electrical system. I forget what they are really called, but it's basically a schematic of the entire electrical system. You can then follow the wires and test the voltages and resistance of each system. There's probably a good amount of information in maintance howto books.